6.1-6.2 review

The standard normal distribution is also called normal curve.

• TRUE

• FALSE

The area under a normal curve is 100.

• TRUE

• FALSE

The curve of a normal distribution extends indefinitely at the tails.

• TRUE

• FALSE

Under a normal curve, a specific proportion may also be expressed in terms of percentage.

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• FALSE

The z score value is in fact, a standard deviation value.

• TRUE

• FALSE

What is the formula to find the corresponding z-score for population data?

• z = X - μ / σ

• z = (X - μ) / σ

• z = μ - X / σ

• z = (μ - X) / σ

Find the corresponding z-score when X = 40, μ = 30 and σ = 5.

• 1

• -2

• 2

• -1

Find the corresponding z-score of a PE score of 39 given that μ = 45 and σ = 6.

• 1

• -2

• 2

• -1

Find the raw score given z = -1.5, μ = 26, and σ = 4.

• 20

• 32

• 28

• 30

Find the raw score given z = 2, μ = 50, and σ = 4.

• 46

• 50

• 54

• 58